CN115921700A

CN115921700A - Cantilever bending and stripping mechanism of continuous stamping die system

Info

Publication number: CN115921700A
Application number: CN202211540699.1A
Authority: CN
Inventors: 黄国明
Original assignee: Kunshan Jiahua Precision Industry Co ltd
Current assignee: Kunshan Jiahua Precision Industry Co ltd
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-04-07

Abstract

The application discloses continuous stamping die system cantilever is bent and is taken off material mechanism, when realizing that the wide-angle is bent and is rolled over the shell fragment blank in advance, the product material area is fed smoothly, and this mechanism includes: a cantilever forming assembly movably combined on the lower die; the bending sliding block is movably combined on the cantilever forming combination body, and one end of the bending sliding block extends to form a bending female die cantilever structure; the wedge block is movably combined on the cantilever forming assembly; the elastic sheet is bent to push the sliding block laterally, and is movably combined on the lower die; a cantilever bridge pressing block combined with the upper die; a slotting tool combined with the upper die; when the upper die and the lower die are closed, the cantilever bridge pressing block drives the wedge block to move along the negative direction of the Y axis, and the slotting tool drives the elastic sheet bending side pushing sliding block to approach to the bending female die cantilever structure along the direction of the Y axis; when the wedge block moves along the negative direction of the Y axis, the bending sliding block can be driven to move along the direction of the X axis; when the wedge block moves forwards along the Y axis, the bending sliding block resets along the X axis.

Description

Cantilever bending and stripping mechanism of continuous stamping die system

Technical Field

The application relates to a die structure, in particular to a cantilever bending and stripping mechanism of a continuous stamping die system.

Background

In the middle of metal stamping products, a plurality of products are provided with elastic sheet structures which need to be folded reversely, and the bending line directions of the elastic sheets are different. In the bending process of the continuous stamping die, the product material belt is required to be timely and continuous, and the product material belt can smoothly feed and move in a die cavity. Therefore, the spring plate structure which needs to be folded back cannot be used in the normal straight up and downThe male die part and the female die part are formed. The forming die part is often designed into a duckbilled cantilever structure so as to leave enough clearance space for the forming process of the elastic sheet and the shape after bending. Thus, the reverse folded elastic sheet can form a strip plane with the strip plane after being bent and formed

The shaped jaw structure is hooked on a cantilever of the forming female die. Under the condition that the bending line of the elastic sheet is parallel to the feeding direction of the material belt, the single elastic sheet structure is used for judging whether the feeding direction of the material belt is the same as the bending direction of the elastic sheet>

Although the shaped jaw is hooked on the concave mould cantilever, at the moment that the moving feeding action starts after the material belt floats, due to the bending springback and the existence of the material passing gap between the material guiding part and the material belt, the square jaw is used for pressing the concave mould cantilever>

The form jaw structure will be withdrawn a little bit further and will not be sufficient to catch on the die cantilever.

However, in the case of a symmetric double-sided inflected spring structure, the situation is quite different. The symmetric bilateral reverse-folding elastic sheet is formed, and naturally, the symmetric cantilever bending parts are needed to complete the forming. After the bending forming is finished, a pair of the bending forming plates is formed

The shape jaw structure is hooked on two symmetrical concave die cantilevers. Although a bending spring back can also be provided for>

The shape jaw can not be attached to the concave die cantilever, but the bilateral hook is used for preventing the material passing gap between the material guiding part and the material belt from deviating to any side. In this case, although there is little physical clearance between the product and the cantilevered die parts, any slight angular deflection will cause a side @asthe web begins to move in the mold cavity>

The shape jaw is scraped to the concave die cantilever first. While one side is

The concave die cantilever is scraped by the shape jaw, and the strip is inclined to a larger extent. A greater tilting of the material web will soon result in the other side being taken over>

The shape jaw scrapes the corresponding concave die cantilever. Under the repeated influence, the two sides are->

The shape jaws are arranged on the concave mould cantilevers corresponding to the shape jaws respectively, and a user pulls the concave mould cantilevers to move forwards when the concave mould cantilevers are pulled, dropped, collided and collided.

This easily results in two that would otherwise have some clearance

The shape is kept silent, is in the same place with two die cantilever locking tightly to drag the material area and can not normally remove. The process from starting feeding to stopping moving of the material belt is finished in a very short moment, and the time is far shorter than the time of one feeding period. Therefore, once such a situation occurs, the material belt cannot be timely moved to the correct stamping station, which causes the material belt to be misfed. If the upper die 100 is knocked down under the condition, a light person damages the material belt and needs to stop the machine to be processed, so that the production efficiency is influenced; the heavy weight damages the mold, causing more loss. Therefore, the phenomenon that the concave die cantilever is locked by the bilateral reverse-folding elastic sheet structure is really a serious potential safety hazard in the stamping production process and needs to be eliminated.

Disclosure of Invention

The present application provides a technical solution to solve the above problems in order to overcome the above disadvantages.

In order to achieve the purpose, the application provides the following technical scheme:

the utility model provides a cantilever of continuous stamping die system is bent and is taken off material mechanism, includes:

the device comprises an upper die and a lower die which are matched with each other, and an X-axis direction, a Y-axis direction and a Z-axis direction which are mutually vertical are defined, wherein the Y-axis positive direction is the die opening direction of the upper die relative to the lower die, and the Z-axis positive direction is the feeding direction of a product material belt;

the cantilever forming assembly is movably combined on the lower die and can reciprocate relative to the lower die along the direction of the Y axis, and a space area for implanting a product material belt is formed between the cantilever forming assembly and the upper surface of the lower die;

the bending sliding block is movably combined on the cantilever forming assembly and can reciprocate relative to the cantilever forming assembly along the direction of the X axis, and one end of the bending sliding block along the direction of the X axis extends to form a bending female die cantilever structure;

the wedge block is movably combined on the cantilever forming assembly and can reciprocate relative to the cantilever forming assembly along the direction of the Y axis, and the wedge block is matched with the bending sliding block through an inclined plane;

the elastic piece bending side pushing sliding block is movably combined on the lower die and can reciprocate relative to the lower die along the direction of the X axis, and the elastic piece bending side pushing sliding block and the bending female die cantilever structure are oppositely arranged along the direction of the X axis and form a space for accommodating a pre-bent elastic piece blank;

a cantilever bridge pressing block combined with the upper die;

a slotting tool combined with the upper die;

when the upper die and the lower die are closed, the cantilever bridge pressing block drives the wedge block to move along the negative direction of the Y axis, and the slotting tool drives the elastic piece bending side pushing sliding block to approach to the bending female die cantilever structure along the direction of the Y axis; wherein

When the wedge block moves along the negative direction of the Y axis, the bending slide block can be driven to move along the direction of the X axis; and when the wedge block moves forwards along the Y axis, the bending slide block resets along the X axis.

The material conveying device comprises a lower die, a cantilever forming assembly and a plurality of floating pins, wherein the cantilever forming assembly is arranged on the lower die, the floating pins are movably combined on the lower die and are positioned under the product material belt, the floating pins can reciprocate relative to the lower die along the direction of a Y axis, one end of each floating pin is propped against the lower surface of the product material belt, and the floating pins can move the product material belt and the cantilever forming assembly together relative to the lower die along the forward direction of the Y axis for a certain distance so that the product material belt and the cantilever forming assembly are spaced from the upper surface of the lower die.

Furthermore, a sliding groove penetrates through the cantilever forming assembly along the Y-axis direction, the wedge is correspondingly in sliding fit in the sliding groove, a spring groove is formed in the position, corresponding to the side wall of the wedge, of the inner wall of the sliding groove, a floating spring is implanted in the spring groove, the floating spring is set to be in a pre-pressing state and can continuously provide a floating force towards the Y-axis direction for the wedge, and when the upper die and the lower die are opened, one end of the wedge upwards floats along the Y-axis direction and exceeds the upper surface of the cantilever forming assembly.

Furthermore, the cantilever forming assembly comprises a cross beam which is lengthwise along the X-axis direction, two bridge pier portions which are respectively arranged below two ends of the cross beam along the X-axis direction, and a cantilever bridge which is at least partially fixed below the cross beam along the Y-axis direction, wherein the two bridge pier portions are implanted into a frame opening formed by the depression on the upper surface of the lower die along the Y-axis direction, and the cantilever forming assembly spans on the product material belt.

Furthermore, the cantilever bridge comprises a bearing section and a fixed section which are integrally arranged, the bending sliding block is movably combined on the bearing section and is in sliding fit with the bearing section through a dovetail groove, the cross beam is fixedly combined with the fixed section, and the sliding groove is formed in the bearing section.

The upper surface of the lower template is locked by screws, each pier portion corresponds to the position of the pier portion pressing plate, the position of each pier portion pressing plate is sunken to form a shoulder, and the pier portion pressing plates are pressed and limited above the shoulders and used for limiting the upward excessive displacement of the pier portions.

Furthermore, the upper die also comprises a profiling supporting piece formed by protruding along the Y axis in the negative direction, the lower end face of the profiling supporting piece is matched with the upper surface of the bending female die cantilever structure, and when the upper die and the lower die are closed, the lower end face of the profiling supporting piece can be correspondingly pressed on the upper surface of the bending female die cantilever structure.

Furthermore, the number of the bending sliding blocks is two, the end faces of the two bending sliding blocks opposite to each other in the X-axis direction form inclined planes matched with the wedge blocks, and the wedge blocks are located right above the two inclined planes and correspondingly form matched inclined planes matched with the inclined planes.

Further, the bending device comprises two withdrawing springs, wherein spring grooves are formed in the contact surfaces of the two bending sliding blocks and the cantilever forming assembly in a recessed mode, the withdrawing springs are arranged in the spring grooves and set to be in a pre-pressing state, under the action of the withdrawing springs, the two bending sliding blocks can continuously bear two thrust forces which are close to each other and are generated by the withdrawing springs, and the inclined surfaces of the end portions of the two bending sliding blocks are always in contact with the matched inclined surfaces of the lower sections of the wedge blocks.

Furthermore, the bearing section and the elastic piece bending side pushing sliding block are located behind the cross beam along the Z-axis forward direction.

Compared with the prior art, the beneficial effects of this application are: when the large-angle bending pre-folding elastic sheet blank is carried out, the product material belt is smoothly fed.

Drawings

Fig. 1 is a schematic perspective view of a cantilever bending stripping mechanism of a continuous stamping die system, which particularly shows a schematic state diagram of an upper die and a lower die when the upper die and the lower die are opened.

Fig. 2 is a front view of the cantilever bending stripper mechanism of the continuous stamping die system shown in fig. 1 along the Y-axis direction.

Fig. 3 is a partially exploded perspective view of a cantilever bending and stripping mechanism of a continuous stamping die system according to the present application, particularly showing a schematic perspective view of a beam and a cantilever bridge after being separated from a lower die.

Fig. 4 is a partial exploded perspective view of the cantilever bending and stripping mechanism of the continuous stamping die system, specifically showing a schematic perspective view of the cross beam, the cantilever bridge, one of the pier portions and one of the pier portions after the pressing plates are separated from the lower die.

Fig. 5 is a front view of the cantilever bending stripper mechanism of a continuous stamping die system shown in fig. 4 along the Y-axis direction.

Fig. 6 is a partial exploded perspective view of the cantilever bending and stripping mechanism of the continuous stamping die system, specifically showing a schematic perspective view of the cross beam, the cantilever bridge, the two pier portions, and the two pier portions after the pressing plates are separated from the lower die.

Fig. 7 is a partial exploded perspective view of the cantilever bending and stripping mechanism of the continuous stamping die system, specifically showing a schematic perspective view of the beam, the cantilever bridge, an abutment portion pressing plate, and the lower die plate after separation from the lower die.

Fig. 8 is an exploded perspective view of an upper mold of the cantilever bending stripper of the continuous stamping die system of the present application.

Fig. 9 is an exploded perspective view of a lower die of a cantilever bending stripper mechanism of a continuous stamping die system according to the present application.

Fig. 10 is a front view of a lower die of the cantilever bending stripper mechanism of the continuous press die system shown in fig. 9 in the Y-axis direction.

Fig. 11 is a partially exploded perspective view of the cantilever bending stripper mechanism of the continuous stamping die system of the present application, particularly illustrating a perspective view of the stripper plate and two blades separated from the upper die.

Fig. 12 is a partially exploded perspective view of a cantilever bending stripper mechanism of a continuous stamping die system according to the present application, particularly illustrating a partially exploded perspective view of an upper die.

Fig. 13 is an enlarged view of the structure within the dotted rectangular frame in fig. 2.

Fig. 14 is an enlarged view of the structure within the dashed circle in fig. 13.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

For the sake of accuracy of the overall description, all the related directions are referred to fig. 1, wherein the sliding direction of the bending slider 8 is indicated by X-axis direction, the mold opening or closing direction of the upper mold 100 and the lower mold 200 is indicated by Y-axis direction (wherein Y-axis direction is the mold opening direction, or Y-axis direction is upward), and the feeding direction of the product tape 35 is indicated by Z-axis direction. Wherein the direction of the X axis, the direction of the Y axis and the direction of the Z axis are mutually vertical.

Referring to fig. 1 to 14, a cantilever bending stripper for a continuous stamping die system disclosed in the present application includes a cantilever bridge 7, where the cantilever bridge 7 is a mounting carrier for two bending sliders 8 and a wedge 10. Wherein, the end of the two bending sliding blocks 8 far away from each other along the X-axis direction is a bending die cantilever structure 81, and the end of the two bending sliding blocks 8 adjacent along the X-axis direction is an inclined matching surface 82. The cantilever bridge 7 comprises a bearing section 701 and a fixing section 702 which are integrated, two bending sliding blocks 8 are arranged on the bearing section 701 of the cantilever bridge 7 and are positioned in a sliding track 71 which is formed on the cantilever bridge 7 and extends along the X-axis direction, and the bending sliding blocks 8 are in sliding fit with the cantilever bridge 7 through dovetail grooves. The two bent sliders 8 are provided with semicircular spring grooves (not numbered) at corresponding positions matched with the sliding tracks 71 of the cantilever bridge 7, and the withdrawing spring 9 is arranged in the semicircular spring grooves. The withdrawing spring 9 is set to be in a pre-pressing state, and under the action of the withdrawing spring 9, the two bending sliding blocks 8 can continuously receive the pushing force pushing towards the central axis direction of the cantilever bridge 7. Therefore, the rear end inclined planes of the two bent slide blocks 8 can be always contacted with the inclined plane of the lower section of the wedge block 10. The wedge 10 is inserted into the sliding slot 72 of the bearing section 701 of the cantilever bridge 7 along the Y-axis direction. The inner wall of the sliding groove 72 is provided with a semicircular spring groove (not numbered) corresponding to the side wall of the wedge 10, and a floating spring 11 is arranged in the semicircular spring groove. The buoyancy lift spring 11 is set in a pre-stressed state, and can continuously provide upward (Y-axis positive direction) buoyancy lift force for the wedge 10, and the buoyancy lift force can ensure that the wedge 10 floats upwards along the sliding groove 72 in the cantilever bridge 7 under the condition of not receiving downward pressure. But the floating height of the wedge 10 is limited by two wedge limiting pins 12. The two wedge limiting pins 12 are installed in the bearing section 701 of the cantilever bridge 7 along the Z-axis direction, and specifically, referring to fig. 3, the two wedge limiting pins 12 are correspondingly inserted and fixed in a barrel groove 7011 formed on the bearing section 701. The two wedge limiting pins 12 are in height position and can just penetrate through limiting grooves (not numbered) formed on two side faces of the wedge 10, which are not provided with the buoyancy lifting springs 11. The two wedge limiting pins 12 are matched with the limiting grooves for use, so that the wedge 10 can only reciprocate in a preset area along the Y-axis direction, and preferably, the wedge 10 is limited to float to a position protruding upwards to the upper surface of the cantilever bridge 7 by 0.7 mm.

Referring to fig. 1 to 7, the fixing section 702 of the cantilever bridge 7 is tightly fitted in the U-shaped groove 151 on the back surface of the cross member 15. The specific installation position of the cantilever bridge 7 in the U-shaped groove 151 is accurately controlled and fixed by two positioning pins 13, and is locked and fixed by a locking screw 14 after being accurately positioned. The two ends of the beam 15 are respectively placed on the top ends of the two pier portions 16. The proper positions of the two ends of the cross beam 15 are provided with positioning slots 152, and the top ends of the two pier parts 16 are provided with limiting bosses 161. The positioning engaging groove 152 and the position-limiting projection 161 are precisely machined, so that the relative positions of the cross beam 15 and the pier portion 16 can be precisely determined by the close fit of the positioning engaging groove 152 and the position-limiting projection 161, and then the positioning engaging groove and the position-limiting projection are fastened together by the two fixing screws 17. To this end, the cantilever bridge 7, the cross beam 15 and the two pier portions 16 are precisely connected together and form a cantilever forming assembly (not numbered); . The two pier portions 16 of the cantilever forming assembly are respectively installed in the two frame openings 51 of the lower template 5 in a sliding fit manner, the two frame openings 51 are respectively arranged at two side positions of a product material belt region (not numbered, which is actually a region of the lower template 5 for carrying a product material belt 35) (also can be described as that the two frame openings 51 are respectively arranged at two end positions of the product material belt region along the X-axis direction), and specifically refer to fig. 3 in conjunction with fig. 4. A striking plate 18 passes through the through hole in the lower mat 6 and bears upwardly against the lower surfaces of the abutments 16, the underside of the striking plate 18 being sprung (not shown). The effect of the strike promotion 18 is to provide an upward buoyant lift to the entire cantilever forming assembly.

Referring to fig. 2 and fig. 6, the cantilever bridge 7 carrying the two bending sliders 8 and the wedge blocks 10 can be spanned on the product tape 35 by the cross beam 15 and the bridge abutment 16. The product strip 35 is lifted by the float pin 33, which is supported by a spring (not shown) from below, and is in a floating state. The entire cantilever forming assembly is also supported by the strike deck 18 in a levitated state, except that the lower surface of the cantilever bridge 7 is slightly higher than the upper surface of the product web 35 to ensure that there is sufficient play for the product web 35 during the feed movement (Z-axis movement, also known as feeding).

The lowering force to which the cantilever forming assembly is subjected is exerted by a cantilever bridge pressing block 24 above the cantilever bridge 7 and a beam pressing block 25 above the beam. Wherein still inlaying two profile modeling support piece 26 on the cantilever bridge briquetting 24, the lower terminal surface of profile modeling support piece 26 matches with the upper surface of bending die cantilever structure 81, and can correspond and support the upper surface at bending die cantilever structure 81, and this profile modeling support piece 26's setting is for in the middle of the product material area 35 of turning over the book shell fragment blank 351 in-process of folding over in advance, provides the auxiliary stay for the weak slider 8 of bending in advance in the middle of the shell fragment blank 351 space.

The cantilever bridge pressing block 24 and the beam pressing block 25 are correspondingly installed in the frame opening 41 of the stripper plate 4 in a close fit manner, and hung in the hanging groove 411 on one side of the frame opening 41 in a hanging table (not numbered) upside down manner to prevent falling downwards. Besides, the stripper plate 4 is provided with positioning pins 27 and stripper pins 28, and the mounting holes 271 (shown in fig. 11) of the positioning pins 27 are precisely machined to provide precise positioning for the product tape 35. The material-removing pin 28 is used for assisting the positioning pin 27 inserted in the positioning hole 350 on the product material belt 35 to be removed when the mold is opened by the material-removing force provided by the material-removing spring 29 installed above the material-removing pin 28 (specifically, when the mold is opened, the positioning pin 27 synchronously removes the backing plate 3 and the material-removing plate 4 together and the material-removing pin 28 keeps the downward force on the product material belt 35 by the downward force of the material-removing spring 29, so that the product material belt 35 cannot synchronously move upwards along with the positioning pin 27). The upper end surfaces of the cantilever bridge pressing block 24, the beam pressing block 25 and the positioning pin 27 are all propped against the lower surface of the backing plate 3. The stripper plate 3 and the stripper plate 4 are locked together by screws.

Referring to fig. 7, 9 and 10, two pressing blocks 22 are disposed below the two bending sliders 8 with a product tape 35 therebetween. The two material pressing blocks 22 are tightly installed in the two frame openings 52 of the lower template 5, and the two material pressing blocks 22 are used for pressing the product material belt 35 along the Z-axis direction in a matched and descending manner of the bending slide block 8. Two second frame openings 53 are further formed in the lower template 5 on the outer side of the frame openings 52 in the X-axis direction, and the elastic piece bending side-pushing sliding blocks 19 are installed in the second frame openings 53 in a sliding fit mode. The elastic sheet bending side pushing slide block 19 can reciprocate in a preset range along the X axis. The upper end of the elastic sheet bending side pushing slider 19 extends along the X-axis direction to form a stamping bending head 191 (shown in fig. 10), and the stamping bending head 191 cooperates with the two bending sliders 8 to stamp and bend the pre-bent elastic sheet blank 351 on the product material belt 35.

Specifically, a spring blind hole (not shown) is formed in a side surface of each elastic piece bending side pushing slider 19, which is close to the first frame opening 52 along the X axis, and a return spring (not shown) is placed in the spring blind hole. One end of the return spring is abutted against the inner wall of the second frame opening 53 and is responsible for providing return power for the elastic sheet bending side pushing slider 19 after the reverse bending elastic sheet is bent and formed, so that the elastic sheet bending side pushing slider 19 continuously receives thrust far away from the first frame opening 52 along the X axial direction. Therefore, in the mold opening state, the return spring always pushes the two elastic pieces to bend and push the sliding block 19 laterally. The side of the elastic sheet bending side push slide block 19 far away from the first frame opening 52 is pressed against two slotting cutter stop blocks 23 which are also arranged in the second frame opening 53, and the slotting cutter stop blocks 23 are embedded into the second frame opening 53 and are tightly matched with the second frame opening 53. The slider cushion block 21 is cushioned below the two elastic sheet bending side-pushing sliders 19, and the upper surfaces of the elastic sheet bending side-pushing sliders 19 are pressed by slider pressing plates 34 (refer to fig. 6 and 7) locked on the upper surface of the lower template 5, so that the elastic sheet bending side-pushing sliders 19 are prevented from tilting or jumping out in the sliding process. The bottom surfaces of the slotting tool stop block 23 and the slider cushion block 21 are all pressed against the upper surface of the lower backing plate 6, and the lower backing plate 6 is locked with the lower template 5.

The side of the two elastic piece bending side pushing sliders 19 away from the first opening 52 forms a matching inclined plane 191 (or the opposite outer ends of the two elastic piece bending side pushing sliders 19 along the X-axis direction form matching inclined planes 191), corresponding to the two slotting tools 30. The two slotting tools 30 are responsible for applying power towards the pre-folded spring blank 351 to the spring bending side-pushing slider 19 after the product material belt 35 is positioned and compressed. After passing through the stripper plate 4 and the stripper plate 3, the two slotting tools 30 are slidably mounted in the mounting frame opening 21 of the upper clamping plate 2. A pressure plate groove (not numbered) is formed on the slotting tool 30, a slotting tool pressure plate 31 extends into the pressure plate groove, and the slotting tool pressure plate 31 is locked on the upper clamping plate 2 by a fastening screw 32. In the upper clamping plate 2, two clamping plate limiting columns 36 are further mounted between the two mounting frame openings 21 along the X-axis direction, and the lower end faces of the clamping plate limiting columns 36 are pressed against the upper surface of the stripping plate 3 in the closed state of the mold to limit the stripping return stroke. The upper end surfaces of the slotting tool 30 and the splint limiting column 36 are pressed against the lower surface of the upper backing plate 1, and the upper backing plate 1 and the upper splint 2 are locked together by screws.

The operation principle of the present application is described in detail below:

in the mold opening state, the punch slide starts to descend from the top dead center position, and drives the upper mold 100 to descend synchronously. The stripper plate 4 in the stripper state presses the cantilever bridge pressing block 24, the cross beam pressing block 25 and the positioning pins 27 to the lower die 200. As the upper die 100 is pressed down, the first parts of the upper die 100 and the lower die 200 to come into contact with are the cantilever bridge pressing piece 24 and the wedge 10 floating with respect to the cantilever bridge 7. When the lower surface of the cantilever bridge compact 24 touches the upper surface of the wedge 10, the wedge 10 starts to be pressed downwards. The descending of the wedge block 10 pushes the two bending slide blocks 8 to extend and advance towards the direction (X-axis direction) far away from the central axis of the cantilever bridge 7. When the wedge block 10 is pressed down until the upper surface of the wedge block is flush with the upper surface of the cantilever bridge 7, the two bending slide blocks 8 are also pushed to the working positions; meanwhile, the lower surface of the cantilever bridge pressing block 24 contacts the upper surface of the cantilever bridge 7, the lower surface of the beam pressing block 25 also contacts the upper surface of the beam 15, and the positioning pins 27 are synchronously inserted into the positioning holes of the product material belt 35 which is fed in place. The stripper members then press the cantilevered forming assembly to continue lowering, and the product web 35 is also pressed by the cantilevered bridge 7 and the lower surface of the stripper plate 4 to begin to approach the lower die surface (i.e., the upper surface of the lower die plate 5) until the lower surface of the product web 35 abuts the upper surface of the lower die plate 5.

As the upper mold 100 continues to descend, the stripper plate 4 with the components mounted thereon and the stripper back plate 3 are blocked from descending again. But they will continue to die and press the precisely positioned product web 35, ensuring that the pre-folded blank 351 will not move out of position when it is bent. Then, the upper clamp plate 2 with the slotting tool 30 will continue to descend, and when the inclined surface of the lower end of the slotting tool 30 contacts the matching inclined surface 191 at the rear end of the elastic sheet bending side pushing slider 19, the slotting tool 30 starts to apply pushing force to the elastic sheet bending side pushing slider 19. Next, the elastic piece bending side pushing slider 19 starts to horizontally slide (in the X axis direction) and rapidly punch toward the pre-folded elastic piece blank 351 by being pushed by the continuously descending slotting tool 30, and performs a bending operation on the pre-folded elastic piece blank 351 by being coupled with the bending slider 8 which is waiting at the working position. And when the slide block of the punch press descends to a bottom dead center, the lower end surface of the clamping plate limiting column 36 is abutted against the upper surface of the backing plate 3 and then stops. The slotting tool 30 also pushes the elastic sheet bending side pushing slide block 19 to the stroke limit thereof, at the moment, the pre-folded elastic sheet blank 351 is changed into an inversely folded elastic sheet from the blank, and a stamping bending forming action is completed to form a die assembly state.

After the stamping, bending and forming actions are completed, the sliding block of the punch press leaves the bottom dead center, and an upward return stroke is started. The upward movement of the punch press ram drives the upper die 100 to rise, and firstly, the upper clamping plate 2 carries the slotting tool 30 to move rapidly upward. When the slotting tool 30 is lifted upwards, the elastic sheet bending side pushing sliding block 19 attached to the inclined plane at the lower end of the slotting tool 30 is pushed by the return spring to retreat. After the inclined plane at the lower end of the slotting tool 30 is completely separated from the inclined plane of the elastic sheet bending side pushing sliding block 19, the rear end of the elastic sheet bending side pushing sliding block 19 immediately pushes the slotting tool stop block 23 to return to the original position. After the upper clamping plate 2 goes upward for a stripping stroke, the stripping plate 4 carries the parts mounted on the stripping plate to start to be pulled upwards. The cantilever forming assembly, which is pressed by the cantilever bridge pressing block 24 and the beam pressing block 25, and the formed product tape 35 are synchronously lifted under the pushing and lifting of the pushing and lifting block 18 and the floating pin 33, respectively. The product strip 35 stops floating after reaching the upper limit of the floating height, and the cantilever forming assembly stops after continuously floating a small section of strip moving space. As the upper die 100 continues to rise upwardly again, the lower surfaces of the cantilever bridge pressing piece 24 and the beam pressing piece 25 are disengaged from the upper surfaces of the cantilever bridge 7 and the beam 15, respectively. However, thereafter, the wedge 10 which is first contacted with the die 100 continues to rise upward by the elastic force of the rising spring 11, following the cantilever bridge pressing piece 24 which presses it (the wedge 10), and then its upper surface gradually rises above the upper surface of the cantilever bridge 7. The wedge 10 is floated and the action response of the two bending sliders 8 pressed by the lower slope of the wedge 10 is obtained. The two bending sliding blocks 8 can be quickly retracted and retracted towards the direction close to the central axis of the cantilever bridge 7 under the action of the retraction spring 9. When the wedge 10 floats to the upper surface 0.7mm higher than the upper surface of the cantilever bridge 7. The lower side surface of the limit groove on the side surface of the wedge block 10 touches the lower surface of the wedge block limit pin 12, so that the wedge block limit pin 12 prevents the wedge block 10 from continuously floating upwards. The wedge block 10 stops floating upwards, so that the two bending slide blocks 8 are forced to stop withdrawing. However, although the two bending sliders 8 cannot be further retracted, the distance of the two bending sliders 8 that is retracted is such that a large gap 300 (see fig. 14 in combination with fig. 13 and 2) is formed between the bending die cantilever structure 81 at one end of the two bending sliders 8 and the pre-bent spring blank 351 that has just been bent. This gap 300 serves to accommodate the amount of deflection that may occur in the pre-crimped blank 351 as the product web 35 is fed through. It is also exactly that this section of safety clearance 300 between two bending slider 8 and the pre-folding shell fragment blank 351 exists, just can guarantee that the removal of feeding next of product material area 35 can smoothly go on, just also can eliminate completely because of the pre-folding shell fragment blank 351 is bent the potential safety hazard that the locking is bent die cantilever structure 81 and is caused, even the pre-folding shell fragment blank 351 has the situation of a little slope to appear, also can absolutely not appear locking the phenomenon on die cantilever structure 81 of bending. After the safety gap 300 is formed, the upper mold 100 continues to ascend with the punch slide until the punch slide returns to the top dead center again, and a punching return stroke is completed to form a mold opening state.

In this scheme, the bending direction of the symmetric reverse-folding spring plate structure (the structure formed by bending the pre-folding spring plate blank 351) on the product material belt 35 is upward, so that the bending die cantilever structure 81 needs to be arranged above the product material belt 35. The bending die cantilever structure 81 above the product material belt 35 depends on the beam 15 to span across the whole product material belt 35, and in order to facilitate the feeding and moving of the product material belt 35, the pier parts 16 of the beam 15 must be separated at two sides of the product material belt 35 and installed in the lower template 5. Since the pre-folding spring blank 351 needs to be folded back at a larger angle, the cantilever thickness of the bending die cantilever structure 81 needs to be made very thin to have a sufficient clearance. The bending die cantilever structure 81 is thin and inevitably has poor strength, so the bending action in the application is performed by a side-push forming mode. And a spring plate bending side pushing slide block 19 is arranged opposite to the bending die cantilever structure 81 in a side pushing slide block mode. During the forming process, the elastic sheet bending side push slider 19 is pushed by the slotting tool 30 arranged in the upper clamping plate 2, and applies bending force to the pre-bending elastic sheet blank 351. After the forming is completed, the elastic sheet bending side pushing slide block 19 is pushed back to the original position by the return spring so as not to block the feeding of the product material belt 35. The bending mode can ensure the rigidity of the bending die cantilever structure 81 in the bending forming process, greatly prolong the service life of the bending die cantilever structure, and is also beneficial to the stress balance of the corresponding positions of the pre-bending shrapnel blank 351 and the product material belt 35 when the bending die cantilever structure is bent at a large angle. And the arrangement of the elastic sheet bending side pushing slide block 19 is also the same, and the pier 16 of the cross beam 15 must be arranged on a post-station of a bending station, so that the structure of the whole mould system is complicated. In order to comprehensively consider the mechanism function, the working life, the machining process, the assembly precision and the manufacturing cost, the die system is mainly designed and disassembled into the form of the embodiment of the application.

Although embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the application, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a cantilever of continuous stamping die system is bent and is taken off material mechanism which characterized in that includes:

the device comprises an upper die and a lower die which are matched with each other, and an X-axis direction, a Y-axis direction and a Z-axis direction which are perpendicular to each other are defined, wherein the positive direction of the Y-axis is the die opening direction of the upper die relative to the lower die, and the positive direction of the Z-axis is the feeding direction of a product material belt;

a cantilever bridge pressing block combined with the upper die;

a slotting tool combined with the upper die;

when the upper die and the lower die are assembled, the cantilever bridge pressing block drives the wedge block to move along the negative direction of the Y axis, and the slotting tool drives the elastic piece bending side pushing sliding block to approach to the bending female die cantilever structure along the direction of the Y axis; wherein

2. The continuous stamping die system cantilever bending stripper mechanism of claim 1, wherein: still include a plurality of flotation pin, flotation pin swing joint is on the lower mould and is located the product material area under, and flotation pin can be relative lower mould along Y axle place direction reciprocating motion, the lower surface in product material area is pushed up to the one end of flotation pin, and flotation pin can be with product material area and cantilever shaping assembly relative lower mould along Y axle forward movement certain distance together, makes the product material area and cantilever shaping assembly and the upper surface of lower mould spaced apart.

3. The continuous stamping die system cantilever bending stripper mechanism of claim 1, wherein: the cantilever forming assembly is characterized in that a sliding groove penetrates through the cantilever forming assembly along the Y-axis direction, the wedge is correspondingly and slidably matched in the sliding groove, a spring groove is formed in the position, corresponding to the side wall of the wedge, of the inner wall of the sliding groove, a floating spring is implanted in the spring groove, the floating spring is set to be in a pre-pressing state and can continuously provide a floating force in the Y-axis positive direction for the wedge, and when the upper die and the lower die are opened, one end of the wedge in the Y-axis positive direction floats upwards and exceeds the upper surface of the cantilever forming assembly.

4. The continuous stamping die system cantilever bending stripper mechanism of claim 3, wherein: the cantilever forming assembly comprises a cross beam which is lengthwise along the X-axis direction, two bridge pier portions which are respectively arranged below two ends of the cross beam along the X-axis direction, and a cantilever bridge which is at least partially fixed below the cross beam along the Y-axis direction, wherein the two bridge pier portions are implanted into a frame opening formed by the upper surface of the lower die in a concave mode along the Y-axis direction, and the cantilever forming assembly stretches across the product material belt.

5. The continuous stamping die system cantilever bending stripper mechanism of claim 4, wherein: the cantilever bridge comprises a bearing section and a fixed section which are integrally arranged, the bending sliding block is movably combined on the bearing section and is in sliding fit with the bearing section through a dovetail groove, the cross beam is fixedly combined with the fixed section, and the sliding groove is formed in the bearing section.

6. The continuous stamping die system cantilever bending stripper mechanism of claim 4, wherein: the upper surface of the lower template is locked by screws, each pier portion corresponds to the corresponding pier portion pressing plate, the position of the pier portion pressing plate is sunken to form a shoulder, and the pier portion pressing plates are in pressing fit limit on the shoulder for limiting the pier portion from upwards excessively displacing.

7. The continuous stamping die system cantilever bending stripper mechanism of claim 1, wherein: the upper die further comprises a profiling supporting piece formed by protruding along the Y axis in the negative direction, the lower end face of the profiling supporting piece is matched with the upper surface of the bending female die cantilever structure, and when the upper die and the lower die are closed, the lower end face of the profiling supporting piece can be correspondingly abutted against the upper surface of the bending female die cantilever structure.

8. The continuous stamping die system cantilever bending stripper mechanism of claim 1, wherein: the two bending sliding blocks are arranged, inclined planes matched with the wedge blocks are formed on the end faces, opposite to each other, of the two bending sliding blocks in the X-axis direction, and the wedge blocks are located right above the two inclined planes and correspondingly formed with matched inclined planes matched with the inclined planes.

9. The continuous stamping die system cantilever bending stripper mechanism of claim 8, wherein: the two bending sliding blocks are in contact with the contact surface of the cantilever forming assembly in a movable fit mode, a spring groove is formed in a concave mode, the withdrawing spring is arranged in the spring groove and set to be in a pre-pressing state, under the effect of the withdrawing spring, the two bending sliding blocks can continuously receive thrust which is obtained by the withdrawing spring to enable the two bending sliding blocks to be close to each other, and the inclined surfaces of the end portions of the two bending sliding blocks are in contact with the matched inclined surface of the lower section of the wedge all the time.

10. The continuous stamping die system cantilever bending stripper mechanism of claim 5, wherein: the bearing section and the elastic piece bending side pushing sliding block are located behind the cross beam along the Z-axis forward direction.